Top portion of a liquid container



FIG. 1 is a perspective view of a top portion of a liquid container showing our new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

Dashed lines in the drawings indicate environmental information that forms no part of the ornamental design of the liquid container. 

The ornamental design for a top portion of a liquid container, as shown and described. 